Yard chores just got easier with the new SharperBlade weed wacker and Trimmer blade from Sun Joe. The SharperBlade replacement blade quickly gets your yard work done without the hassle and frustration of traditional string trimmers. Engineered from durable nylon embedded in polymer, the SharperBlade cuts like a mower blade. SharperBlade’s self-sharpening system gives you the reliability and convenience you demand from your garden tool. Replacement blade for Sun Joe 24V Cordless SharperBlade Stringless Lawn Trimmer 24V-SB10 (CT, LTE) Trimmer/Edgers only.